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The manager of a small park randomly surveyed residents in the community and asked whether they visited the park in the past year. The table shows the results.


What is the 95% confidence interval for the difference between the percent of residents who are younger than 50 and who are 50 and older that visited the park in the past year?

 

(9.5, 31.1)

 

(13.7, 26.9)

 

(14.9, 25.7)

 

(7.4, 33.2)

 Mar 23, 2020
 #1
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It is 7.4, 33.2 .

 Mar 31, 2020

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